Some solar occultation observations are known to be affected by spacecraft pointing issues. Below is a list of occultation times where a problem was detected.

 

List of bad occultations as of 17/09/2020:

20180716_180012
20180729_032027
20180801_020413
20180813_005418
20180817_141652
20180831_004625
20180924_121500
20181129_191923
20181130_225027
20181231_120328
20190103_155621
20190109_053246
20190208_111815
20190221_192824
20190226_053334
20190307_074029
20190307_121411
20190308_154337
20190310_184613
20190326_175712
20190401_120605
20190402_205109
20190430_105909
20190618_161206
20190715_100109
20190715_195012
20190721_100412
20190817_100202
20190820_183942
20191002_165617
20191120_101137
20191208_095432
20191225_145933
20200127_072113
20200203_204557
20200305_215812
20200323_063831
20200616_160029
20200714_161239
20200818_032503

 

Images:

In the figures below, the transmittance for a single pixel is given as a function of altitude. Each detector bin is plotted individually (bin 0 is blue; bin 1 is orange; bin 2 is green; bin 3 is red).

The dotted black line shows the deviation from the nominal pointing - if the deviation is sufficient that the field of view of a detector bin moves off the solar disk, the transmittance will decrease. These features should not be interpreted as clouds or other properties of the Martian atmosphere.